Is this non toxic? I had some cups made and need a clear coat on the inside.
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tongue oil is a natural nut oil. It is a better choice for wood bowls, cups, and cutting boards. Just be sure it is REAL tongue oil. Most products that say tongue oil on the container contain none. For 100% environmental friendly solutions, use 100%tongue oil thinned with a citrus based thinner. Saturate and polish if you like. Waterproof and uv resistant
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